Printing mechanism



J. w. BRYCE PRINTING MECHANISM Filed Oct. 7, 1933 2 Sheets-Sheet 1 INVENTOR 'A'TTQ pril 9, 1935.

33 FIG 2 Afn'il 9, 1935. J w BRYCE 1 ,997,167

PRINTING MECHANISM Filed 00?. 7, 1935 2 Sheets-Shesc 2 FIGA. H 9

INVENTQR ATTORNEY Patented Apr. 9, 1935 1,997,167

UNITED STATES PATENT OFFICE PRINTDIG MECHANISM James W. Bryce, Bloomfield, N. 1., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application October 7, 1933, Serial No. 692,580

6 Claims. (Cl. 101-93) This invention relates to tabulating machines Fig. 2 is a detail showing the operating cams and more specifically to improvements in the for the printing mechanism. printing mechanism of such machines. Fig. 3 is an end view of the stop pawls for locat- The invention finds particular utility in coning the positioning devices.

5 nection with tabulating machines of the type Fig. 4 is a simplified circuit diagram showing 8 such as disclosed in Patent No. 1,762,145, grantthe connections between the card analyzing deed June 10, 1930 to G. F. Daly and R. E. Page. In vices and the controlling magnets for the printtabulating machines of such type, the printing ing mechanism. mechanism usually consists of aplurality of type Referring to Fig. 4, record cards R are fed 10 bars mounted for vertical reciprocation and are downwardly by means of the usual picker 10 past 10 moved hpwardly and down again for each card aset of analyzing brushes II which n y P fed through the machine. During the upward at s i r d cards a p e circuits stroke the type bars are differentially positioned through printer magnets I! at differential times under control of perforations in record cards and depending p location of the Perforation at the end of their upward stroke an impression in t e co u ns analyzed by e l 15 is taken from the variously positioned type bars, Cam controlled contacts I! and card lever con- Following this, the type bars are moved downtacts ll control the completion of the circuitsso wardly torestored position. In order that the that none, will be established unless record cards machine cycles do not become too lengthy, the are moi/i118 P the brllSheS- Feed rollers i5 restoring movement of the type bars is necesserve to advance the cards past the brushes and 20 sarily effected in the shortest possible time, h rollers are driven by s n generally deswhich, however, takes an appreciable portion of ignated at It, o d under control Of motor a machine cycle and where the number of type This is the Arrangement 0 e Card bars to be restored is fairly large, th i ti feeding mechanism and for further description 5 of the'mass'to be restored ha a limiting efleet thereof, reference may be had to the patent reon the rapidity with which th hi may ferred to. Also driven" by motor l1, through be operated. gears I8, is a shaft is which drives the printing The principal object of the inv nti i t 1 mechanism in unison with the feeding of the prove the organization of the printing mechanism reccrdfcsrds P the brushesgo of tabulating machines whereby the loss of time Referring now to Fig. 1, each type carrier 20 during machine cycles is minimized by eliminatis Supported P 8 Shaft II by ea Of an m' ing the independent resetting operations and the 22 and has integral therewith a block 23 through speed of the machine may be increased s which the movement of the type carrier is conconsequence. trolled. A pair of fingers, 24 and 25 are adapted Each type carrier is provided with dual posito cooperate with one side of block 23 to advance 35 tioning mechanism alternately operable under e carrier to printing posi i n A P Of control of successively analyzed records and 8 25 a d" cooperate with e pp Side adapted to alternate in their operations s th t of block 23 and serve to move the carrier back one positioning'device may position the type to restored or normal position. The fingers 26 carrier and then move it to restored position and 21 are freely pivoted on the shaft 21 and are 40 while the other tends to operate in reversed seconnected by m ans f sp s and 29 t0 the quence; that is, while onedevice is restoring the fingers n respectively, h forming a type carrier, the other will take control thereof P of resilient i s d v to move it to a new position. Finger has integral therewith an arm 30 Various other objects and advantages of the connected y a spring II to a ball 32 and fing r 4 invention will be obvious fromthe following par- 25 has a i ila a II connected by a n s ticular description of one form of mechanism 34 o a b ll Balls 3 d 35 are piv D embodying the invention or from an inspecti n the shaft II and are provided with cam follower of the accompanying drawings; and the invenrollers 36 and controlled by cams 38 and 39,

tion also constitutes certain new and novel fearespectively- 50 tures of construction and combination of parts The a ran ent s c a 88 bail 31 is hereinafter set forth and claimed. rocked in a clockwise direction by its cam, the In the drawings:' ball 35 will be moved in the opposite direction Fig. 1 is an isometric view of one of the type 'by its cam 3!. Movement of either bail in a 5 carriers and the pofltioning devices therefor. clockwise directionwill causethe associatedarms 3| or I3 to follow under control of springs II and 24 and if the movement of the arms. is not ob- .structed, the fingers 24 and 25 will cooperate normally held in the position shown in Fig. 2'

by the armature 4| of printing magnet I2. As arm 40 moves in a clockwise direction and finger 24 and carrier 20 move likewise, energization of printer magnet I2 under control of a perforation in the record will trip pawl 44 into engagement with one of the teeth 4| and further movement of arm 4| and consequently carrier 2| will be interrupted, spring |l yielding as bail 32 continues to its extreme position. At this time there is a momentary dwell in the movement of the parts during which the usual printing hammers 4| are tripped to take an impression from the positioned type elements.

The position of the parts in Fig. 1 represents the relationship of the parts with carrier 2| positioned to present the 2" type element in printing position, the pawl 44 having been tripped as the tooth 4| corresponding to the"2" type element moved past the stopping position. Following the printing operation, the cam Bl carried by shaft II will cooperate with the follower roller il mounted upon a link 52, one end of which is supported by an arm 54 on shaft 44 to which is also secured a bail 55 whose function is to re-' store the latches 41.

As the ball 22 now moves in a counterclockwise direction carrying with it the arms 3| and fin gers 24, the springs 28 will tend to urge the fingers 2| and through them the carriers 20 to restored position. Inthe meantime, however, the bail 38 is moving in a clockwise direction and finger 25 and arm 42 are moving in the same direction and when the extremity of finger 25 strikes block 2!, it will pick up carrier 20 and, overcoming the tension of the relatively light spring 2|, will reverse the direction of movement of the carrier and assume control thereover. During this clockwise movement of the bail 3!, the next succeeding record card is passing the brushes II and magnet l2 may be energized to engage one of the teeth 43 to differentially position the finger 25, thus setting the carrier 2| in a new position.

It will be observed that the movement of finger 25 may be interrupted before it has made contact with block 28, as for instancewhen the pawl 45 is tripped to engage the lowermost tooth 43. In this event, the carrier 2| and block 2| will advance until the latter engages the finger 25 and will be interrupted at that point, finger 24 continuing to advance to the limit of its movement alone.

Due to the overlapping operation of the two positioned devices, carrier 2| will, under certain conditions, move directly from one printing position to the next printing position and under other conditions, it may first move in a restoring direction from one printing position and its direction of movement reversed and the carrier advanced to the next printing position.

The resilient mounting of pawls 44 permits the positioning of the two arms 4| and 42 under control of a single magnet l2, the arrangement being such that same set of teeth is being moved upwardly to restoring position during which the cooperating pawl is obviously being vibrated under control of the teeth, this vibration of the pawl will not interfere with the other pawl which can be operated independently to coact with the advancing arm.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is as follows:

1. In a machine of the class described, means for analyzing record cards successively for perforations in the columns thereof, a type carrier associatedwith each column, a pair of positioning devices for said carrier and means for alternately controlling said positioning devices under control of successive cards.

2. In a machine of the class described, means for analyzing record cards successively, a type carrier and means for advancing the same, means controlled by a record card for positioning said carrier during its advance, means for restoring said carrier and further means controlled by a subsequently analyzed record card for reposi tioning said carrier during its movement of restoration.

3. In a machine of the class described, a type carrier, resilient means for advancing said carrier, resilient means for restoring said carrier and record controlled means for interrupting said carrier during movement in either direction.

4. In a printing machine, a type carrier, means for advancing said carrier, means controlled by a perforation in a record card for positioning said carrier during its advance, means for restoring said carrier to its initial position, and means for causing advance of said carrier to a new position before it has been restored to its initial position.

5. In a printing machine, a type carrier, means for moving said carrier in two directions, positioning means and means controlled by a record card for controlling said positioning means to limit the extent of movement of said carrier in either direction.

6. In a printing machine, a type carrier, means for advancing the same to printing position, record controlled 'means for interrupting the advance of said carrier at differential times, restoring means for the carrier.and further record controlled means for interrupting the restoration of said carrier at differential times.

JAMES W. BRYCE. 

